package com.sias.mianshiya.controller;

import cn.hutool.json.JSONUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.sias.mianshiya.annotation.AuthCheck;
import com.sias.mianshiya.common.BaseResponse;
import com.sias.mianshiya.common.DeleteRequest;
import com.sias.mianshiya.common.ErrorCode;
import com.sias.mianshiya.common.ResultUtils;
import com.sias.mianshiya.constant.UserConstant;
import com.sias.mianshiya.exception.BusinessException;
import com.sias.mianshiya.exception.ThrowUtils;
import com.sias.mianshiya.model.dto.question.QuestionAddRequest;
import com.sias.mianshiya.model.dto.question.QuestionEditRequest;
import com.sias.mianshiya.model.dto.question.QuestionQueryRequest;
import com.sias.mianshiya.model.dto.question.QuestionUpdateRequest;
import com.sias.mianshiya.model.entity.Question;
import com.sias.mianshiya.model.entity.QuestionBankQuestion;
import com.sias.mianshiya.model.entity.User;
import com.sias.mianshiya.model.vo.QuestionVO;
import com.sias.mianshiya.service.QuestionBankQuestionService;
import com.sias.mianshiya.service.QuestionBankService;
import com.sias.mianshiya.service.QuestionService;
import com.sias.mianshiya.service.UserService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * 题目接口
 *
 * @author <a href="https://github.com/lisias">程序员鱼皮</a>
 * @from <a href="https://www.code-nav.cn">编程导航学习圈</a>
 */
@RestController
@RequestMapping("/question")
@Slf4j
public class QuestionController {

  @Resource
  private QuestionService questionService;

  @Resource
  private UserService userService;

  // region 增删改查

  /**
   * 创建题目
   *
   * @param questionAddRequest
   * @param request
   * @return
   */
  @PostMapping("/add")
  public BaseResponse<Long> addQuestion(@RequestBody QuestionAddRequest questionAddRequest, HttpServletRequest request) {
    ThrowUtils.throwIf(questionAddRequest == null, ErrorCode.PARAMS_ERROR);
    // todo 在此处将实体类和 DTO 进行转换
    Question question = new Question();
    BeanUtils.copyProperties(questionAddRequest, question);
    List<String> tags = questionAddRequest.getTags();
    if (tags != null && !tags.isEmpty()) {
      question.setTags(JSONUtil.toJsonStr(tags));
    }
    // 数据校验
    questionService.validQuestion(question, true);
    // todo 填充默认值
    User loginUser = userService.getLoginUser(request);
    question.setUserId(loginUser.getId());
    // 写入数据库
    boolean result = questionService.save(question);
    ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
    // 返回新写入的数据 id
    long newQuestionId = question.getId();
    return ResultUtils.success(newQuestionId);
  }

  /**
   * 删除题目
   *
   * @param deleteRequest
   * @param request
   * @return
   */
  @PostMapping("/delete")
  public BaseResponse<Boolean> deleteQuestion(@RequestBody DeleteRequest deleteRequest, HttpServletRequest request) {
    if (deleteRequest == null || deleteRequest.getId() <= 0) {
      throw new BusinessException(ErrorCode.PARAMS_ERROR);
    }
    User user = userService.getLoginUser(request);
    long id = deleteRequest.getId();
    // 判断是否存在
    Question oldQuestion = questionService.getById(id);
    ThrowUtils.throwIf(oldQuestion == null, ErrorCode.NOT_FOUND_ERROR);
    // 仅本人或管理员可删除
    if (!oldQuestion.getUserId().equals(user.getId()) && !userService.isAdmin(request)) {
      throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
    }
    // 操作数据库
    boolean result = questionService.removeById(id);
    ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
    return ResultUtils.success(true);
  }

  /**
   * 更新题目（仅管理员可用）
   *
   * @param questionUpdateRequest
   * @return
   */
  @PostMapping("/update")
  @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
  public BaseResponse<Boolean> updateQuestion(@RequestBody QuestionUpdateRequest questionUpdateRequest) {
    if (questionUpdateRequest == null || questionUpdateRequest.getId() <= 0) {
      throw new BusinessException(ErrorCode.PARAMS_ERROR);
    }
    // todo 在此处将实体类和 DTO 进行转换
    Question question = new Question();
    BeanUtils.copyProperties(questionUpdateRequest, question);
    // 数据校验
    questionService.validQuestion(question, false);
    // 判断是否存在
    long id = questionUpdateRequest.getId();
    Question oldQuestion = questionService.getById(id);
    ThrowUtils.throwIf(oldQuestion == null, ErrorCode.NOT_FOUND_ERROR);
    // 操作数据库
    boolean result = questionService.updateById(question);
    ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
    return ResultUtils.success(true);
  }

  /**
   * 根据 id 获取题目（封装类）
   *
   * @param id
   * @return
   */
  @GetMapping("/get/vo")
  public BaseResponse<QuestionVO> getQuestionVOById(long id, HttpServletRequest request) {
    ThrowUtils.throwIf(id <= 0, ErrorCode.PARAMS_ERROR);
    // 查询数据库
    Question question = questionService.getById(id);
    ThrowUtils.throwIf(question == null, ErrorCode.NOT_FOUND_ERROR);
    // 获取封装类
    return ResultUtils.success(questionService.getQuestionVO(question, request));
  }

  /**
   * 分页获取题目列表（仅管理员可用）
   *
   * @param questionQueryRequest
   * @return
   */
  @PostMapping("/list/page")
  @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
  public BaseResponse<Page<Question>> listQuestionByPage(@RequestBody QuestionQueryRequest questionQueryRequest) {
    ThrowUtils.throwIf(questionQueryRequest == null, ErrorCode.PARAMS_ERROR);
    Page<Question> questionPage = questionService.listQuestionByPage(questionQueryRequest);
    return ResultUtils.success(questionPage);
  }

  /**
   * 分页获取题目列表（封装类）
   *
   * @param questionQueryRequest
   * @param request
   * @return
   */
  @PostMapping("/list/page/vo")
  public BaseResponse<Page<QuestionVO>> listQuestionVOByPage(@RequestBody QuestionQueryRequest questionQueryRequest,
                                                             HttpServletRequest request) {
    long current = questionQueryRequest.getCurrent();
    long size = questionQueryRequest.getPageSize();
    // 限制爬虫
    ThrowUtils.throwIf(size > 20, ErrorCode.PARAMS_ERROR);
    // 查询数据库
    Page<Question> questionPage = questionService.page(new Page<>(current, size),
            questionService.getQueryWrapper(questionQueryRequest));
    // 获取封装类
    return ResultUtils.success(questionService.getQuestionVOPage(questionPage, request));
  }

  /**
   * 分页获取当前登录用户创建的题目列表
   *
   * @param questionQueryRequest
   * @param request
   * @return
   */
  @PostMapping("/my/list/page/vo")
  public BaseResponse<Page<QuestionVO>> listMyQuestionVOByPage(@RequestBody QuestionQueryRequest questionQueryRequest,
                                                               HttpServletRequest request) {
    ThrowUtils.throwIf(questionQueryRequest == null, ErrorCode.PARAMS_ERROR);
    // 补充查询条件，只查询当前登录用户的数据
    User loginUser = userService.getLoginUser(request);
    questionQueryRequest.setUserId(loginUser.getId());
    long current = questionQueryRequest.getCurrent();
    long size = questionQueryRequest.getPageSize();
    // 限制爬虫
    ThrowUtils.throwIf(size > 20, ErrorCode.PARAMS_ERROR);
    // 查询数据库
    Page<Question> questionPage = questionService.page(new Page<>(current, size),
            questionService.getQueryWrapper(questionQueryRequest));
    // 获取封装类
    return ResultUtils.success(questionService.getQuestionVOPage(questionPage, request));
  }

  /**
   * 编辑题目（给用户使用）
   *
   * @param questionEditRequest
   * @param request
   * @return
   */
  @PostMapping("/edit")
  public BaseResponse<Boolean> editQuestion(@RequestBody QuestionEditRequest questionEditRequest, HttpServletRequest request) {
    if (questionEditRequest == null || questionEditRequest.getId() <= 0) {
      throw new BusinessException(ErrorCode.PARAMS_ERROR);
    }
    // todo 在此处将实体类和 DTO 进行转换
    Question question = new Question();
    BeanUtils.copyProperties(questionEditRequest, question);
    List<String> tags = questionEditRequest.getTags();
    if (tags != null && !tags.isEmpty()) {
      question.setTags(JSONUtil.toJsonStr(tags));
    }
    // 数据校验
    questionService.validQuestion(question, false);
    User loginUser = userService.getLoginUser(request);
    // 判断是否存在
    long id = questionEditRequest.getId();
    Question oldQuestion = questionService.getById(id);
    ThrowUtils.throwIf(oldQuestion == null, ErrorCode.NOT_FOUND_ERROR);
    // 仅本人或管理员可编辑
    if (!oldQuestion.getUserId().equals(loginUser.getId()) && !userService.isAdmin(loginUser)) {
      throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
    }
    // 操作数据库
    boolean result = questionService.updateById(question);
    ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
    return ResultUtils.success(true);
  }

  // endregion
}
